diff --git a/.gitignore b/.gitignore
index 1c2d52b6..f5378f80 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 .idea/*
+os/target/*
diff --git a/os/.cargo/config b/os/.cargo/config
new file mode 100644
index 00000000..6a5ba745
--- /dev/null
+++ b/os/.cargo/config
@@ -0,0 +1,2 @@
+[build]
+target = "riscv64gc-unknown-none-elf"
\ No newline at end of file
diff --git a/os/Cargo.lock b/os/Cargo.lock
new file mode 100644
index 00000000..b85588b1
--- /dev/null
+++ b/os/Cargo.lock
@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "os"
+version = "0.1.0"
diff --git a/os/Cargo.toml b/os/Cargo.toml
new file mode 100644
index 00000000..b6770dc1
--- /dev/null
+++ b/os/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "os"
+version = "0.1.0"
+authors = ["Yifan Wu <shinbokuow@163.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/os/src/lang_items.rs b/os/src/lang_items.rs
new file mode 100644
index 00000000..c03b9538
--- /dev/null
+++ b/os/src/lang_items.rs
@@ -0,0 +1,6 @@
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
+}
diff --git a/os/src/main.rs b/os/src/main.rs
new file mode 100644
index 00000000..8d4ade6f
--- /dev/null
+++ b/os/src/main.rs
@@ -0,0 +1,5 @@
+#![no_std]
+#![no_main]
+
+mod lang_items;
+